With a macabre catalog of brain scans andÂ ultrasoundpictures, a new study details the devastation done to 45 Brazilian babies whose mothers were infected with Zika duringÂ pregnancy. TheÂ study, published Tuesday in the journal Radiology, is the most comprehensive collection of such images so far, and it reveals a virus that can launch assaults beyondÂ microcephaly, the condition of unusually small heads that has become the sinister signature of Zika.